<?php  
// +----------------------------------------------------------------------  
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]  
// +----------------------------------------------------------------------  
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.  
// +----------------------------------------------------------------------  
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )  
// +----------------------------------------------------------------------  
// | Author: 麦当苗儿 <zuojiazi@vip.qq.com> <http://www.zjzit.cn>  
// +----------------------------------------------------------------------  
namespace Think;  
  
class Page{  
    public $firstRow; // 起始行数  
    public $listRows; // 列表每页显示行数  
    public $parameter; // 分页跳转时要带的参数  
    public $totalRows; // 总行数  
    public $totalPages; // 分页总页面数  
    public $rollPage   = 11;// 分页栏每页显示的页数  
    public $lastSuffix = true; // 最后一页是否显示总页数  
  
    private $p       = 'p'; //分页参数名  
    private $url     = ''; //当前链接URL  
    private $nowPage = 1;  
  
    // 分页显示定制  
    private $config  = array(  
        'header' => '<li><span>共 %TOTAL_ROW% 条记录<span class="sr-only"></span></span></li>',  
        'prev'   => '<<',  
        'next'   => '>>',  
        'first'  => '1...',  
        'last'   => '...%TOTAL_PAGE%',  
        'theme'  => '%FIRST% %UP_PAGE% %LINK_PAGE% %DOWN_PAGE% %END%',  
    );  
  
    /** 
     * 架构函数 
     * @param array $totalRows  总的记录数 
     * @param array $listRows  每页显示记录数 
     * @param array $parameter  分页跳转的参数 
     */  
    public function __construct($totalRows, $listRows=20, $parameter = array()) {  
        C('VAR_PAGE') && $this->p = C('VAR_PAGE'); //设置分页参数名称  
        /* 基础设置 */  
        $this->totalRows  = $totalRows; //设置总记录数  
        $this->listRows   = $listRows;  //设置每页显示行数  
        $this->parameter  = empty($parameter) ? $_GET : $parameter;  
        $this->nowPage    = empty($_GET[$this->p]) ? 1 : intval($_GET[$this->p]);  
        $this->nowPage    = $this->nowPage>0 ? $this->nowPage : 1;  
        $this->firstRow   = $this->listRows * ($this->nowPage - 1);  
    }  
  
    /** 
     * 定制分页链接设置 
     * @param string $name  设置名称 
     * @param string $value 设置值 
     */  
    public function setConfig($name,$value) {  
        if(isset($this->config[$name])) {  
            $this->config[$name] = $value;  
        }  
    }  
  
    /** 
     * 生成链接URL 
     * @param  integer $page 页码 
     * @return string 
     */  
    private function url($page){  
        return str_replace(urlencode('[PAGE]'), $page, $this->url);  
    }  
  
    /** 
     * 组装分页链接 
     * @return string 
     */  
    public function show() {  
        if(0 == $this->totalRows) return '';  
  
        /* 生成URL */  
        $this->parameter[$this->p] = '[PAGE]';  
        $this->url = U(ACTION_NAME, $this->parameter);
        // $this->url = U(ACTION_NAME, array($this->p=>'[PAGE]'));
        // $this->url = str_replace('-p-', '-', $this->url);  
        /* 计算分页信息 */  
        $this->totalPages = ceil($this->totalRows / $this->listRows); //总页数  
        if(!empty($this->totalPages) && $this->nowPage > $this->totalPages) {  
            $this->nowPage = $this->totalPages;  
        }  
  
        /* 计算分页零时变量 */  
        $now_cool_page      = $this->rollPage/2;  
        $now_cool_page_ceil = ceil($now_cool_page);  
        $this->lastSuffix && $this->config['last'] = $this->totalPages;  
  
        //上一页  
        $up_row  = $this->nowPage - 1;  
        $up_page = $up_row > 0 ? '<li><a class="prev" href="' . $this->url($up_row) . '">' . $this->config['prev'] . '</a></li>' : '';  
  
        //下一页  
        $down_row  = $this->nowPage + 1;  
        $down_page = ($down_row <= $this->totalPages) ? '<li><a class="next" href="' . $this->url($down_row) . '">' . $this->config['next'] . '</a></li>' : '';  
  
        //第一页  
        $the_first = '';  
        if($this->totalPages > $this->rollPage && ($this->nowPage - $now_cool_page) >= 1){  
            $the_first = '<li><a class="first" href="' . $this->url(1) . '">' . $this->config['first'] . '</a></li>';  
        }  
  
        //最后一页  
        $the_end = '';  
        if($this->totalPages > $this->rollPage && ($this->nowPage + $now_cool_page) < $this->totalPages){  
            $the_end = '<li><a class="end" href="' . $this->url($this->totalPages) . '">' . $this->config['last'] . '</a></li>';  
        }  
  
        //数字连接  
        $link_page = "";  
        for($i = 1; $i <= $this->rollPage; $i++){  
            if(($this->nowPage - $now_cool_page) <= 0 ){  
                $page = $i;  
            }elseif(($this->nowPage + $now_cool_page - 1) >= $this->totalPages){  
                $page = $this->totalPages - $this->rollPage + $i;  
            }else{  
                $page = $this->nowPage - $now_cool_page_ceil + $i;  
            }  
            if($page > 0 && $page != $this->nowPage){  
  
                if($page <= $this->totalPages){  
                    $link_page .= '<li><a class="num" href="' . $this->url($page) . '">' . $page . '</a></li>';  
                }else{  
                    break;  
                }  
            }else{  
                if($page > 0 && $this->totalPages != 1){  
                   $link_page .= '<li class="active "><span>'.$page.'<span class="sr-only"></span></span></li>';  
                }  
            }  
        }  
  
        //替换分页内容  
        $page_str = str_replace(  
            array('%HEADER%', '%NOW_PAGE%', '%UP_PAGE%', '%DOWN_PAGE%', '%FIRST%', '%LINK_PAGE%', '%END%', '%TOTAL_ROW%', '%TOTAL_PAGE%'),  
            array($this->config['header'], $this->nowPage, $up_page, $down_page, $the_first, $link_page, $the_end, $this->totalRows, $this->totalPages),  
            $this->config['theme']);  
        return "<ul class='pagination'>{$page_str}</ul>";  
    }  
}  